Geared pump



Aug. 26, 1930. M. HEDGLON GEARED PUMP Filed April 'L 1930 mx o INVENTQR ATTORNEY.

Patented AugfvZ,Y 193,10 y

MEAD HRDGLON, or sYRacUsE, NEW YoRx,AssreNoR 'ro M.' L. cusERpcRrER'13R-Ass COMPANY, or sYRAoUsE, lNew YORK, a CORPORATION yor NEW YoRx GEAREDirUMr 1 Appnatibn filedl April' '1,`

This invention relates particularly to marine pumps, of the rotary type, designed for lifting and effecting the circulation of water, yoils and other liquids, and has for its object 5 toprovide simple means to replace, from time to time, certain of the worn out parts of the pump, without necessitating the discarding of the driving and relatedparts.

Heretofore, when theibearing surfaces of yl() the gears and housing of a pump proper be- 1 come worn away and useless,vdue to sandl andv other gritty sediment being carried into the pump when the waters of the sea or other source become roiled or turbid, it has been `1.; more er less the commonpractice to throw away,not only themovable pump parts, including the gears and' housinglbut also to discard the Whole of the kpump mechanism and replace the same with a new pump. This .y 20 not only occasions the stoppage of the pumping work for a considerable time, but also involves considerable extra expensey and the loss of many useful parts. The present invention has for itsvprimary Vobject to modify the body andV housing structure in such manner as to enable the operator to readily vand quickly remove the gears and housing that have become worn out and to replace said parts by new ones without ydisturbing 'the body or the driving parts. further object isto provide a cheek-piece or bush-lining of bronze or other suitable metal, which may be yinterposed between the housing and the main body, in direct contact with the inner ends of the pump gears, to the end that the wear effected by the pump gears, which ordinarily erodes anddistorts the adjacent face'V of the body, maybe absorbed entirely by thev cheekpiece, and thusl leave 'thebody uninjured. ln' practice, the opposing plane faces of the cheek-piecev are ypreferably finished. smooth and4 true, and when one `of its faces has been worn out, the said part maybe re- Vversed andfused during the useful life 4of the renewed gears and housing. 'Bythe provisionY of the cheek-piece, when' the pump'again be e comes worn to such extent that it is incapable of performing eficient work, the housing, cheek-piece and gears alone needbe removed and renewed, and all of the rest of the pump vbeing preferably j ournaler 193.0. vv1 'senat Nol.. 442,288. y

mechanism may be continuedin lservice indef- Y mitely.` f l s e n these objects by the means set forth. inf the detailed descriptiony which fol# lows, and as illustrated by the accompany-y ing,v drawing, in whichi Figure 1 's' a` cen nal section `taken on line ll-l of Fig. 2, showinga double drive rotary pump, ,to which `my improvement is applied. Eig. '2. is. .a front end elevation ofthe same. And Fig. Sfisga side elevation ofj the cheek-piece, showing the f preferably. ground. V 1 i t In the drawing, thebody ofthe pump comprises two parts, as 3 4, which, arel connected and spaced by integral lateral websa (see Figs; land 2), and. supports, allof: the `workingy and` other partsfof the pump. The heady 3 comprises Vparallel v twin barrels 31135, which are boredout aXially,as atlto receive the ftwogdriving shafts, as 5-5. The. front i endof the head 3 is formed withQan oval pertral vertical, longitudico i, l

'area engaged by. the pump gears, Whichfis ,i

foratedfangec'. The freefends-ofthebar-v rels,y Sf'aare counterlbored landfthr'eaded `to. receive packing glands, and @packing 6',k lto prevent rwateror other liquid handledbythe pump from leakage around theshafts.. The

tail-piecefis formed with, barrelslt-la', which register` withbarrels `.3Q-3% and` are 5-157. A The; tail-piece .a may:y also lbeprovded withkr anfoval flange 4, whichjmayfbe' formed` Iwith:.perfolated .ears 4d, .for attaching the pump to any suitable support.ff"l`,he left endof ,thefshaft 5, according toy Fig, ljof lthe vbored, axially atj flb, to. alsojournal the shafts drawing, is'` fitted withV a spur gear-7,1' that meslves and drives a similarggearj"74',A which islrigidtoftlie corresponding end oflshaft y5"..

Gears Tel-7 are formed with similarhubs that are operatively disposed,incounter-bores f eear 7 is ,counter-bored' at 7d', andgisyialso. s formed with va .diametric yslot 7 e, to facilitate.

insertingpower driven shaft, av clutch, or the` like (netA shown), which the whole.

perforated flange 8', that coincides with the flange 3, and between said flanges is disposed a plane removable and reversible cheek-piece or lining, as 9, that overlies the face 3d of the head, and being perforated, like said fianges, and all of said parts being detachably secured by screws 8, Vithin the housing 8, are mounted, upon reduced portions 5ALL of the shafts, the pumping-gears, as lO 10, which are keyed respectively to the shafts, as at 5. The inner ends of gears l0 l0 are in normal frictional contact with the ground outer-face 9 of the cheek-piece 9, while their opposite ends have similar contact with the ground inner Wall 8c of the housing, the said wall being formed externally with a contracted boss 8 having socket bearings 8e, in which the protruding ends 5 of the shafts are jourraled, The gears 7 are respectively keyed to he shafts 5 5', as shown at 5d. The 4hubs 7" of gears 7 7 are preferably formed with circumferential grooves 7i in which may be disposed set-screws, as 7X carried by the barrels -l 4", to prevent longitudinal movement, or escape, of the shafts when the rhousing 8 and pumping gears l() are removed.

The water or other' fluid to be pumped by the gears 10 10 may enter the housingr 8 through a pipe l2, which discharges into a cavity 13, from which the gears carry the fluid to a similar cavity 13, that discharges into a pipe 12.

By driving the pump gears 10 10 simultaneously by the twin shafts 5 5, which in turn are driven by the gears 7 7', the gears 10 are enabled to operate more freely and orderly and with a minimum of grinding friction and thrust, and practically all undue wear and binding of the teeth common to the single drive pumps, are eliminated. This not only tends to prolong the life of the pumping gears, but greatly reduces the power factor.

Obviously, ball-bearings may be substituted for the packed bearings herein shown, and other changes or modifications may be made without departing from the spirit of the invention.

Having thus described my invention, what I claim, is

A pump composed of a head having barrels and having an integral outwardly eX- tending flange at one end thereof, shafts in the barrels extending outwardly from said flange, a one-piece cheek piece having one face abutting the outer face of the flange and having openings to receive the shafts and being removable from the shafts by movement of the cheek piece longitudinally of the shafts, pumping gears on the end portions of the shafts, a housing enclosing said gears and having socket bearings to receive the ends of the shafts and further having an outwardly extending flange which abuts the other face of the cheek piece, said flanges of the head 

